Spark and cinder arrester for locomotives



Oct. 8, 1929. G. CARPENTER 1,731,043

SPARK AND CINDER ARRESTER FOR LOCOMOTIVES Filed June 25, 1924 o l I U fiWENTQR BY W ATTORN EYS'.

Patented Oct. 8, 1929 PATENT OFFICE GUY CARPENTER, on NEW YORK, 1v. Y.

SPARK AND CINIDER ARRESTER FOR LOCOMOTIVES Application filed June 25,

My invention relates to that class of devices which are designed to prevent the escape of sparks and cinders through the stack of a locomotive, and has for its object to provide a device which will effectually separate the heavier particles from the escaping gases.

My invention has for its further object to accomplish this separation in such a manner as to not produce any material back draft.

My invention has for its further object to provide a device in which any desired area for the escaping gases may be provided, and also to obviate the necessity of a long path of travel with its accompanying frictional resistance to the gases.

My means for accomplishing the foregoing objects may be more readily understood by having reference to the accompanying drawings, which are hereunto annexed and made a part hereof, in which:

Fig. 1 shows a fragmentary detail view of the front part of a locomotive boiler and smoke box, in which has ben mounted my improved spark arrester. The View is shown in vertical section for the sake of clearness.

Fig. 2 is a cross-section taken on the line 22 in Fig. 1, in the direction indicated by the arrows.

Similar reference numerals refer to similar parts throughout the entire'description.

As shown in the drawings the smoke box 1 isof the standard type employed on locomotives being provided with the usual stack 2 and draft nozzle 3. The forward ends only of the boiler tubes 4 are shown, for obviously they form no part of my invention. Within the smoke box 1 form a casing 5 which has secured to its front wall 6 an exhaust port 12. The wall of this port is formed of a horizontal cylindrical portion 7, a truncated conoidal portion 8, and a horizontal cylindrical portion 9 at the smaller end of the conoidal portion 8.

Around the periphery of the conoidal por tion I mount a plurality of deflecting vanes 10. These vanes are arranged so as to provide a tangential entrance for the entering gases, causing them to assume a gyratory motion thereafter. The vanes 10 lead to a chamber 11 in the front part of the smoke box, from which the gases escape through the exhaust 1924.. Serial No. 722,253.

port 12. The forward entrance of this exhaust port 12 is closed by a screen 13, which is of suitablemesh to prevent the egress of any particles still remaining in the gases after they have passed between the deflecting vanes.

The operation of the device is as follows The gases passing from the fire box (not shown) enter the smoke box and impinge upon the vanes 10. These vanes impart a whirling motion to the gases, which causes them to '5 gyrate at a very high velocity within the chamber 11. The'result of this is that the heavier particles; cinders, sparks, etc., are thrown outwardly against the periphery of the chamber 11, while the cinder-freed gases escape through the screen 13, passing through the exhaust port 12, emerge through the smoke stack 2. to all intents. and purposes, free from any cinders or sparks.

In operation there is a continually revolving mass of cinders hugging the inner surface of the circumferential wall of the chamber 11.

I provide a number of baflles 1-1 and as illustrated there are three. These baffles are located adjacent openings 15 formed in the bottom portion of the circumferential wall of the chamber 11.

A collecting chamber 16 is secured to the forward end of thesmoke box and openings 15 are provided through the wall of the chamber 11. and lead into this collection chamber. Battles 14 are placed adjacent each of these openings. As the whirling mass of the gases containing solids, such as cinders, sparks, and the like, is rotating in the chamber 11 the said cinders, sparks. and the like, strike the baffles 14. and, being deflected by them, pass through the openings 15 into the collection chamber 16. A hand hole 17 may be provided for 9 cleaning out this chamber.

It is obvious the gases, including a multitude of sparks, cinders, and the like are in whirling motion imparted by the vanes to the gases entering the chamber 11, which causes I the cinders to attain such a high velocity that even after the exhaust nozzle 3 is shut off they will continue to whirl for a perceptible time. Naturally as the motion ceases they will fall to the bottom of the chamber 11, and drop loo into the collecting chamber 16 through the openings 15.

Although I have shown and illustrated a specific form of vane for directing the travel of the escaping gases it will be obvious to persons skilled in the art that my invention is not confined to any specific shape, and I do not wish to be understood as limiting myseli to the exact details shown and described in the drawings, and my invention is not to be limited to the concrete embodiment shown, which is furnished for illustrative purposes only.

Having described my invention what I regard as new, and desire to secure by Letters Patent is:

The combination with a locomotive having a combustion chamber and boiler tubes, of a smoke box at the forward end of said boiler tubes, a stack whichileads from said smoke box, a casing which encloses the inner end of said stack, an exhaust nozzle which leads into said casing below said stack, there being an exhaust port in the front wall of said casmg, a cylindrical member which surrounds said port connected to said casing, a second cylindrical member of larger diameter than the first named one, a truncated con-oidal memher which connects said two cylindrical members, a screen which covers the end of the larger cylinder, a plurality of deflecting vanes mounted on'the outside of said conoidal mem ber, which vanes extend to the inner wall of the smoke box, said vanes being inclined to impart a whirling motionto the products of combustion as they seek egress through the stack.

GUY CARPENTER. 

